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The guide outlines two methods for HPE Aruba Access Points (APs) to discover the WLAN controller in ArubaOS 8 over Layer 3:
1. **Controller Discovery via DNS**: APs use DNS to learn multiple IP addresses of the Mobility Controller. If the primary controller is unavailable, they will try other learned addresses, a process that takes about 3.5 minutes per device. Aruba recommends using a DNS server for minimal network changes and flexible AP placement. APs are pre-configured to look for the hostnames "aruba-master" and "aruba-conductor," requiring proper DNS setup to resolve these names.
2. **Controller Discovery via DHCP Server**: A DHCP server can provide the Mobility Controller's IP address using DHCP option 43 as a vendor-specific attribute. APs identify themselves with the Vendor Class Identifier "ArubaAP." If the AP receives the controller's IP address from DHCP, it will only accept that single address. If the controller is unavailable, it can fall back on DNS-learned IPs. Additional information regarding the configuration of DHCP with vendor-specific options can be found in the Aruba documentation. computer2know :: thank you for your visit :: have a nice day :: © 2025